AAEKX vs. FNSDX

Last updated Jun 4, 2026

AAEKX (American Century One Choice Blend+ 2065 Portfolio) and FNSDX (Fidelity Freedom 2055 Fund Class K) are both Target Retirement Date funds. Over the past 5 years, AAEKX returned 9.25%/yr vs 10.52%/yr for FNSDX. With a 0.97 correlation, they move nearly in lockstep. AAEKX charges 0.58%/yr vs 0.65%/yr for FNSDX.

Performance

AAEKX vs. FNSDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century One Choice Blend+ 2065 Portfolio (AAEKX) and Fidelity Freedom 2055 Fund Class K (FNSDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AAEKX achieves a 11.31% return, which is significantly lower than FNSDX's 13.86% return.

AAEKX

• 1D: 0.14%
• 1M: 4.36%
• YTD: 11.31%
• 6M: 12.42%
• 1Y: 27.54%
• 3Y*: 18.84%
• 5Y*: 9.25%
• 10Y*: —

FNSDX

• 1D: 0.58%
• 1M: 5.12%
• YTD: 13.86%
• 6M: 15.71%
• 1Y: 31.35%
• 3Y*: 20.80%
• 5Y*: 10.52%
• 10Y*: —

*Multi-year figures are annualized to reflect compound growth (CAGR)

AAEKX vs. FNSDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
AAEKX American Century One Choice Blend+ 2065 Portfolio	11.31%	20.17%	15.20%	16.86%	-16.94%	10.08%
FNSDX Fidelity Freedom 2055 Fund Class K	13.86%	23.81%	14.18%	20.65%	-18.23%	10.94%

Correlation

The correlation between AAEKX and FNSDX is 0.97 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.97
Correlation (3Y) Calculated over the trailing 3-year period	0.97
Correlation (5Y) Calculated over the trailing 5-year period	0.97
Correlation (All Time) Calculated using the full available price history since Mar 11, 2021	0.97

The correlation between AAEKX and FNSDX has been stable across timeframes, ranging from 0.97 to 0.97 - a consistent structural relationship.

Return for Risk

AAEKX vs. FNSDX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

AAEKX

AAEKX Risk / Return Rank: 63
AAEKX Sharpe Ratio Rank: 64
AAEKX Sortino Ratio Rank: 60
AAEKX Omega Ratio Rank: 59
AAEKX Calmar Ratio Rank: 62
AAEKX Martin Ratio Rank: 69

FNSDX

FNSDX Risk / Return Rank: 72
FNSDX Sharpe Ratio Rank: 74
FNSDX Sortino Ratio Rank: 68
FNSDX Omega Ratio Rank: 69
FNSDX Calmar Ratio Rank: 71
FNSDX Martin Ratio Rank: 77

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

AAEKX vs. FNSDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century One Choice Blend+ 2065 Portfolio (AAEKX) and Fidelity Freedom 2055 Fund Class K (FNSDX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	AAEKX	FNSDX	Difference
Sharpe ratio: Return per unit of total volatility	2.36	2.50	-0.14
Sortino ratio: Return per unit of downside risk	3.27	3.44	-0.16
Omega ratio: Gain probability vs. loss probability	1.43	1.46	-0.03
Calmar ratio: Return relative to maximum drawdown	3.02	3.27	-0.25
Martin ratio: Return relative to average drawdown	13.29	14.55	-1.26
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AAEKX vs. FNSDX - Sharpe Ratio Comparison

The current AAEKX Sharpe Ratio is 2.36, which is comparable to the FNSDX Sharpe Ratio of 2.50. The chart below compares the historical Sharpe Ratios of AAEKX and FNSDX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	AAEKX	FNSDX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.36	2.50	-0.14
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.63	0.70	-0.08
Sharpe Ratio (All Time) Calculated using the full available price history	0.68	0.74	-0.06

Drawdowns

AAEKX vs. FNSDX - Drawdown Comparison

The maximum AAEKX drawdown since its inception was -26.14%, smaller than the maximum FNSDX drawdown of -30.95%. Use the drawdown chart below to compare losses from any high point for AAEKX and FNSDX.

Drawdown Indicators

	AAEKX	FNSDX	Difference
Max Drawdown Largest peak-to-trough decline	-26.14%	-30.95%	+4.81%
Max Drawdown (1Y) Largest decline over 1 year	-9.26%	-9.76%	+0.50%
Max Drawdown (3Y) Largest decline over 3 years	-16.11%	-15.44%	-0.67%
Max Drawdown (5Y) Largest decline over 5 years	-26.14%	-27.31%	+1.17%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-6.55%	-5.61%	-0.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.10%	2.19%	-0.09%

Volatility

AAEKX vs. FNSDX - Volatility Comparison

The current volatility for American Century One Choice Blend+ 2065 Portfolio (AAEKX) is 3.36%, while Fidelity Freedom 2055 Fund Class K (FNSDX) has a volatility of 4.26%. This indicates that AAEKX experiences smaller price fluctuations and is considered to be less risky than FNSDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AAEKX	FNSDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.36%	4.26%	-0.90%
Volatility (6M) Calculated over the trailing 6-month period	9.36%	10.54%	-1.18%
Volatility (1Y) Calculated over the trailing 1-year period	11.85%	12.78%	-0.93%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.86%	15.03%	-0.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.73%	15.98%	-1.25%

AAEKX vs. FNSDX - Expense Ratio Comparison

AAEKX has a 0.58% expense ratio, which is lower than FNSDX's 0.65% expense ratio.

Dividends

AAEKX vs. FNSDX - Dividend Comparison

AAEKX's dividend yield for the trailing twelve months is around 2.62%, less than FNSDX's 4.97% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
AAEKX American Century One Choice Blend+ 2065 Portfolio	2.62%	2.92%	1.96%	1.67%	4.12%	3.08%	0.00%	0.00%	0.00%	0.00%
FNSDX Fidelity Freedom 2055 Fund Class K	4.97%	3.87%	2.13%	2.07%	11.45%	11.27%	4.26%	6.31%	6.79%	2.72%

Frequently Asked Questions

Can I hold both AAEKX and FNSDX in my portfolio?

With a correlation of 0.97, AAEKX and FNSDX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, AAEKX or FNSDX?

FNSDX has higher volatility (4.26%) compared to AAEKX (3.36%). In terms of maximum drawdown, AAEKX dropped -26.14% vs FNSDX's -30.95%.

Which has better risk-adjusted returns?

FNSDX currently has the higher Sharpe Ratio (2.50 vs 2.36), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.